Loans (Narrative) (Details) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019 USD ($) item	Jun. 30, 2018 item	Jun. 30, 2019 USD ($) item	Jun. 30, 2018 item	Dec. 31, 2018 USD ($)
Number of Loans | item	10	4	12	7
Unamortized premium	$ 2,600		$ 2,600		$ 2,500
Net deferred loan costs	$ 95		95		129
Charged off			$ 823		1,097
Student Loans Purchased [Member]
Number of Loans | item	10	4	12	7
Charged off			$ 2		$ 33
Student Loans Purchased [Member] | Performing [Member]
Number of Loans | item			68
Total Troubled Debt Restructurings			$ 1,200